Monitoring system, monitoring method, and monitoring program

Abstract

An abnormality behind a shielding object is discovered. There is provided a monitoring system including a video acquirer, a detector, and a notifier. The video acquirer of the monitoring system acquires a video. The detector of the monitoring system detects entering of a target object into a blind spot generated by a shielding object in the video and appearance of the target object from the blind spot. If the target object does not appear from the blind spot even after a first time elapses since entering of the target object into the blind spot, the notifier of the monitoring system makes a notification.

The invention claimed is: 
     
       1. A monitoring system comprising:
 at least one memory storing instructions; and 
 at least one processor coupled to the at least one memory and configured to execute the instructions to: 
 acquire a video; 
 detect an entering of a target object into a blind spot generated by a shielding object in the video; 
 detect an entering speed of the target object entering the blind spot; 
 estimate a position of the target object in the blind spot based on the entering speed; 
 estimate a path of the target object behind the shielding object; 
 cause a display device to display the acquired video; and 
 cause the display device to display, on the acquired video, marks indicating the estimated position of the target object in the blind spot and the estimated path of the target object behind the shielding object. 
 
     
     
       2. The monitoring system according to  claim 1 , wherein the at least one processor is further configured to:
 detect an entering direction of the target object into the blind spot; and 
 estimate the position of the target object based on the entering speed and the entering direction. 
 
     
     
       3. The monitoring system according to  claim 1 , wherein
 the marks include an arrow linking a position where the target object entered the blind spot and a predicted appearance position of the target object from the blind spot. 
 
     
     
       4. The monitoring system according to  claim 2 , wherein the at least one processor is further configured to:
 predict an appearance position of the target object from the blind spot based on the entering direction; and 
 cause the display device to further display the predicted appearance position. 
 
     
     
       5. A monitoring method comprising:
 acquiring a video; 
 detecting an entering of a target object into a blind spot generated by a shielding object in the video; 
 detecting an entering speed of the target object entering the blind spot; 
 estimating a position of the target object in the blind spot based on the entering speed; 
 estimating a path of the target object behind the shielding object; 
 causing a display device to display the acquired video; and 
 causing the display device to display, on the acquired video, marks indicating the estimated position of the target object in the blind spot and the estimated path of the target object behind the shielding object. 
 
     
     
       6. The monitoring method according to  claim 5 , further comprising:
 detecting an entering direction of the target object into the blind spot; and 
 estimating the position of the target object based on the entering speed and the entering direction. 
 
     
     
       7. The monitoring method according to  claim 5 , wherein
 the marks include an arrow linking a position where the target object entered and an predicted appearance position of the target object from the blind spot. 
 
     
     
       8. The monitoring method according to  claim 6 , further comprising:
 predicting an appearance position of the target object from the blind spot based on the entering direction; and 
 causing the display device to further display the predicted appearance position. 
 
     
     
       9. A non-transitory computer-readable storage medium storing a program that causes a computer to perform:
 acquiring a video; 
 detecting entering of a target object into a blind spot generated by a shielding object in the video; 
 detecting an entering speed of the target object entering the blind spot; 
 estimating a position of the target object in the blind spot based on the entering speed; 
 estimating a path of the target object behind the shielding object; 
 causing a display device to display the acquired video; and 
 causing the display device to display, on the acquired video, marks indicating the estimated position of the target object in the blind spot and the estimated path of the target object behind the shielding object. 
 
     
     
       10. The storage medium according to  claim 9 , wherein the program further causes the computer to perform:
 detecting an entering direction of the target object into the blind spot; and 
 estimating the position of the target object based on the entering speed and the entering direction. 
 
     
     
       11. The storage medium according to  claim 9 , wherein
 the marks include an arrow linking a position where the target object entered and a predicted appearance position of the target object from the blind spot. 
 
     
     
       12. The storage medium according to  claim 10 , wherein the program further causes the computer to perform:
 predicting an appearance position of the target object from the blind spot based on the entering direction; and 
 causing the display device to further display the predicted appearance position.